Question

são equações me ajudem por favor

Answer 1

$y- \frac{2}{7}= \frac{1}{2}$       m.m.c.(7,2)=14
$14y-4=7$
$14y=7+4$
$14y=11$
$y= \frac{11}{14}$

Answer 2

$y - \dfrac{2}{7} = \dfrac{1}{2}$

$y - \dfrac{2}{7} - \dfrac{1}{2} = 0$

mmc de 7, 2 = 14

$\dfrac{14y - 4 - 7}{14} = 0 \\ \\ \\ 14y - 11 \\ \\ 14y = 11 \\ \\ \\ => y = \dfrac{11}{14}$